Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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The largest earthworm on record was found in South Africa and measured 22 feet.
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The oldest recorded elephant lived for 82 years.
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Dire wolves actually existed, living up to 10,000 years ago before going extinct.
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When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
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When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
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Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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